BENDIX BW2849 manual Code 31 SID 250, FMI 2 J-1587 Data Link Error, Step a

Page 87

Fault Isolation Procedures

Code 31 (SID 250, FMI 2) J-1587 Data Link Error

Step A	Procedure	Condition	Action

1.Key off.

2.Disconnect the Central Processing Unit 32-way connector.

3.Disconnect engine ECU connector which contains the J-1587 data link.

4.Measure resistance between:

• Central Processing Unit 32-way connector pin C7 and engine ECU pin

# (see engine OEM for pin location).

•Central Processing Unit 32-way pin C7 and ground.

If resistance between pin C7 and engine ECU pin is 0 to .3 ohms and if resistance between pin C7 and ground is more than 10K ohms or open circuit [OL]

If resistance is outside of range

Go to Step B.

Repair J-1587 data link wiring harness between engine ECU and Central Processing Unit.

Go to Step V.

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

V

COM

A

V

COM

A

GROUND

SEE ENGINE OEM FOR PIN LOCATION

(SID 250,	Code
FMI	31
2)

2-76

Image 87

Contents Troubleshooting Guide Related Publications Fault Isolation ProceduresGeneral Warnings Suggested ToolsComponent and System Codes Symptom TestsIntroduction PretestsYES Diagnostic ProcedureService Procedure Fault Code Retrieval and ClearingFault Hand-Held Codes Fault Code Isolation Procedure IndexDriving Techniques Speed Input Signal System Right Turn Signal System Key on. If the fault is present,Heat and vibration Brake Input Signal System On. Apply Service Brake For Minimum Seconds. IfDescription Type of Code Driving Technique 250 Seconds to set this faultSymptom-Driving Index Fault Isolation Procedures Service Procedure Overview Electrical PretestElectrical Pretest Step aKey off Disconnect negative battery cable Step BMeasure resistance Step C Driver Power-Up Sequence TestCentral Processing Unit Driver Display Unit Vehicle Harness CentralFreightliner IDI Measure voltage If voltage is between Power-Up Sequence TestKey on Observe the Driver If lights turn on the go off If lights turn on and stay onIf any of the above conditions are not met Go to Step D Measure resistance betweenStep D Key off Measure resistance betweenIf any of the above conditions are not met Go to Step E If any of the above conditions are not met Go to Step F Step EIf any of the above conditions are not met Go to Step G Step FStep G Antenna 4-way connectorStep H Go to Step J StepMeasure resistance between Central Processing Are not metStep J Go to Step L Key on Check error codes If no error codesIf error codes Step KStep L If error codes Go to Step a Find error in testingClearing on If code appears Key off Reconnect all connectors Key onCompatibility problem Contact your Bendix Representative Check for Codes. See If no codes Test completeThis page left blank intentionally Component Code 11 SID 254, FMI 4 Central Processing Unit CPU Basic Hand Tools Troubleshooting GuideCode 11, 12 SID 254, FMI 4, 12, Central Processing Unit CPU Key off Retrieve codes If code 11 is activeIf code 11 is inactive Test complete Component Code 13 SID 9, FMI 2, 4, 5 Driver Display Unit This fault causes a failure of the Bendix Vorad systemDriver Display Unit 4-way Code 13, 34 SID 9, FMI 2, 4, 5, 12 Driver Display UnitAvailable, go to Step B Go to Step If voltage is 7.0 to 7.5 voltsStep C Key off Measure resistance between Central Processing 5,12Step E Repair OEM wiring harness Unit. Go to Step If code other than 13 or TestingAppears Procedure Index on Clearing on page 1 If code 13 or 34 appearsComponent Code 14 SID 1, 2, FMI 2, 12 Antenna Assembly Key off Unplug the Antenna 4-way connector Key on Code 14, 35 SID 1, 2, FMI 2, 12, 14 AntennaPin 3 and pin If voltage is outside of range Step C Step D Step E Step F Go to Step Clearing on page 1 If code 14 appears See Fault Code IsolationComponent Code SID 10, FMI Right Side Sensor Right Side Sensor? Key on Measure voltage between Pins a and B Pins a and CIf voltage between pins a Code 15 SID 10, FMI 2 Right Side SensorIf resistance is outside of range Go to Step D If resistance is outside of range Go to Step E Measure resistance between Way pin C13 and 3-way pin BReplace Central processing Unit. Go to Step See Fault Code Isolation Procedure Index on page 1 Component Code SID 11, FMI Left Side Sensor Left Side Sensor? Code 16 SID 11, FMI 2 Left Side SensorIf resistance is out of range Go to Step D If resistance is out of range Go to Step E Measure resistance between Way pin D13 and 3-way pin BIf resistance is out of range Index on page 1 Clearing on page 1 If code 16 appearsRight Central Processing Unit Turn Signal Component Code SID 7, FMI Right Turn SignalRequired. Go to Step Code 21 SID 7, FMI 2 Right Turn SignalRepair OEM wiring harness as If equipped with a Right Side SensorKey off Turn on right turn signal Volts of battery voltageIf voltage ﬂashes within If code other than 21 appears Left Component Code SID 8, FMI Left Turn SignalCode 22 SID 8, FMI 2 Left Turn Signal If voltage measures within Key off Turn on left turn signalIf code other than 22 appears This fault causes a failure of the Vorad system Component Code SID 3, FMI Brake Input ErrorProper conﬁguration Code 23 SID 3, FMI 2 Brake Input ErrorGo to Step B If the brake lights are not Working correctly Go to StepConnector If there is not a wire in C9 Check pin C9 on 32-way If there is a wire in C9Key off Depress brake pedal Clearing on page 1 If code 23 appears Check for Codes. See If no codes appear Test completeThis page left blank intentionally Component Code SID 6, FMI Speed Input Error Code 24 SID 6, FMI 2 Speed Input Error Unit 32-way connector Have pins in C10 and C11If vehicle uses J-1939 or 1587 conﬁguration Between speed sensor Pins a and B 10K ohms or open circuitOhms Clearing on page 1 If code 24 appears Component Code 25 SID 231, FMI 2, 12 Cruise Signal Error TerminatingResistor If resistance is outside of range Go to Step B Way pin D7 and groundSee Engine OEM for PIN Location See Engine OEM For PIN Location Key off Measure resistance Key on If error codes Problem exists with Engine ECU. Repair Key off Reconnect engine ECU connectorIf code other than 25 appears This page left blank intentionally Component Code SID 250, FMI Data Link Error Code 31 SID 250, FMI 2 J-1587 Data Link Error If resistance is outside of range Go to Step C If communication errors Key on If no communication errorsIf code other than 31 appears This page left blank intentionally Component Code SID 248, FMI Vbus Error If any of the above conditions are not met Go to Step B Code 33 SID 248, FMI 12 Vbus ErrorIf any of the above conditions are not met Go to Step C Driver Display Connector pin D5Step D Clearing on page 1 If code 33 appears On page 1Antenna Not Detecting Targets Symptom Isolation ProceduresAppropriate isolation Properly Go to Step a Procedure Side Sensor Not Detecting Targets Side Sensor Detection Test Between pins 2 Key on Measure voltageGo to Step D If voltage is outside of range Replace Side Sensor Display. Go to Step Go to Step E Measure resistance between Way pin C164-way pin Way pin C16 GroundKey off Measure resistance between Way pin C14 Way pin C14 GroundGo to Step Go to Step F If resistance is outside Key off Measure resistance between Way pin C12Way pin C12 Ground Ground is more thanStep Detection Test There is no fallback mode for this symptom Driver Card Not ReadingNew Driver Card Driver Card Detection Test Appendix Bendix Vorad System Wiring DiagramEatonvorad Wiring DiagramNvram Fault Code Tree